Solvent dependent Zinc(II) coordination polymers with 1,3,5-benzenetricarboxylic acid and the selective photocatalytic degradation for organic dyes

Three Zinc(II) coordination polymers with 1,3,5-benzenetricarboxylic acid (H-3 btc) were synthetized by solvothermal method in NN-dimethylacetamide (DMA), or mixed solvents DMA/H2O(1:1 volatio), respectively. Both [Zn-2(NO3-)(btc)(DMA)(3)](n), 1 and{[Zn-3(btc)(2) (DMA)(3)]center dot 2DMA}(n), 2 were simultaneous obtained when using DMA as solvent, and [(CH3)(2)H2N+ [Zn(btc)]center dot(H2O)(DMA}](n), 3 was self-assembled in the mixed solvent DMA/H2O. Compound 1 shows 3D framework with two crystallographic independent zinc ions; and Compound 2 is a 3D porous framework with three crystallographic independent zinc ions and the ligand bdc have two kinds of link modes. Moreover, 2D (4,4') network compound 3 has only one crystallographic independent zinc ions, then the 2D (4,4') network stacking as AAA... modes along a axis to form 3D hydrogen bonded network. Therefore, the solvents play an important role in the process of self-assembly with zinc ions and ligands. Furthermore, the compound 3 represent selective photocatalytic degradation for organic dyes, and there is best photocatalytic efficiency for methyl orange in the catalysis system with H2O2. (C) 2020 Elsevier B.V. All rights reserved.

Automated summary

Three zinc coordination polymers with different structures were synthesized, using different solvents to construct lattice networks of different dimensions. One of the compounds was found to exhibit selective photocatalytic degradation for organic dyes.